Steam-generator.



2 SKEBTS-SHEET 1.

Patented Aug; 2, 1910.

PPLIGATION FILED APR. 14, 1910.

W. GQ Y.

STEAM GENERATOR. I APPLICATION FILED APR: 14, 1910. 66,201 n Patented Aug. 2, 1910.

z SHEETS-SHEET 2.

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yWIlLiLlAlVl GEORGE HAY, OF TUBES-OOK, LIVEEPOL, ENGLAND.

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Application tiled April 14, 3.910. Serial No. 555,4

To all 'whom 'it may concern:

Be it known that l, llvlLLiiM Gremien HAY, a subject of the King of England, residing at Tuebrook, Liverpord. in the county of Lancaster', England, have invented new and useful Improvements Relating to Steam- Generators, of which the following is a specification.

The present invention has reference to tubular steam generators of the type genen ally called flash or,semiash steam generators, that is, the kind in which a small quantity of water is contained in the steam generating portions, and the water supplied or delivered to it is rapidly generated. and the steam is superheated or dried prior to leaving; and it further relates to that type in which the quantity of steam made and supplied is automatically controlled by the expansion and contraction of a part of the steam generator, and a thcrmostatic device.

The object of the present invention has been to provide a steam generator this type which is simple and inexpensive, and in which the automatic control of the generation of steam, and general working, are reliably eiected, so that it is capable of being used Without attention, beyond keeping it supplied with fuel. `-Under this invention, the body of the steam generator has the Water conduit embedded in it in the form of tWo or more concentric coils with passages between. l"lhe conduit occupies more or less the greater length of the body, and is connected with a suitable feed water pipe, having a controlling valve, Which is automatically actuated through the medium of a heat regulating or thermostatic device attached to the body of the generator, and is caused to operate by 'the expansion or contraction of th'e generatorl body due to the varying temperature thereof. If desired, the thermostatic device may also be connected with one or more of the dampers of thegenerator furnace, and thus provide means of regulating` the same by the admission of air tothe furnace, and by controlling the adinissibn of feed water.

The therniostatic device is carried on the body, having the embedded Water conduit by means of spaced lugs or other means attached thereto, and is so constructed that as the 'generator body expands, the connection tends to become stra-ight or flat, and in so doing, actuates the Water valve, and may be the damper or dampers.

Specification of Letters atcnt.

.Patented rust 5 i916.

ln the drawings, li`igurel is a u elevation showing a steam generator in section; and Fig. 2 an elevation. showing the generator in outsidV View, but at a' point relnored 90" from that at which Fig. l is taken.

ln the drawings, the body of the steam generator' is 'of a vertical cylindrical type, such as is commonly employed in what are known as slow combustion "i stoves for burning solid fuel, and it comprises a cylindrical body or casing u, a hood o, and base c. The body o is provided at the 'bottom with an entrance (I ilor clraning and lighting the furnace, or other purpose, and has connected with it a door c which serves as a means or'having accessl to the interior of the furnace portion of the generator, and for regulating the amount of a" admitted in the well known way; while the hood b is provided with an air inlet f, having upon it a door or damper f" for regulating the quantity ot' air admitted to the hood b, which is automatically controlled, and serves to regulate and controll the draft.

lVithin `the bot y or casing a there is ernployed a cast metal-say cast iron-cylindri :al fasting ff', in which is embedded a coil or coils oi.l metal tubing through which the water to be converted into steam, and the steam produced from it, are passed; and the fuel which is burned lies and burns within this cylinder. The upper part of the cylindrical casting t' is thicker' than the lower part, and the annular thicker portion overhangs the lower part, and tubiilar passages f7 are provided-castMin it, and extend through it, and serve as heating surface,jand as passages 'for the exit of the combustion gases. The heat of combustion has also access to the interior sxuzlace of this upper part ot' the cylinder i: the gases having access to it by a small annular passage between it and the depending tube t, leading into the hood 0,' into .which yalso lead the tubular passages l. The depending tube l/L has a cover or door y at the top, and extends down from theupper partot the hood l); and is at the top provided with an annular flange j, which tits and rests in the hood, and it serves to conduct the t'ucl down into the `furnace below. I

The thermo governing device or regulator is connected with the cylinder c', and is so arranged and adapted that according to the temperature oi it-z' c., the cylinder, and

loo i its consequent length between certain points, at any given temperature, so will be the .mount of opening given to the Water supply regulating cock 0,' and as this length varies, as the temperature which is in it varies, so will this amount of opening of the water cock be varied by the action of the thermo regulator. The therlno'regnlator also operates in connection with the means ot' regulating the combustion by the fuel. namely. it is connected with an air valve or damper f which is opened and closed b v it: and should the temperature within the t'urnace become very excessive, the valve or damper f will be opened more or less (it being normally closed when the apparatus Iis working; and water is being supplied to thc steam generating tubes). and the quantity of air supplied to the fuel through the inlet (l (dla` to the greater or less opening oi the damper or valve f1) will be regulated. That is, it will be less when the valve f' is opened. and normal when closed. ln the case shown. the contraction and expansion ot the '-ylindrical casting a' is transmitted to the thermo regulator from different points in itsl length, by lugs m cast upon it atlditferent points in its height;

and b v connecting to these lugs two metalI strips n.. bowed wider apart at the center than the` ends. and coupled up with the water cot-lvr n, (and the damper f1),.the longitudinal expansion and contraction of the cylinder z' is conveyed to the strips fn., and they are brought nearer together or pressed tarthc apart in the one, than in the other case, resi ect i vely.

The body or case of the feed water regulating' valve or cock o-which may be of any suitanle kind--is fixed to one ot' the strips u. and its spindle 7) is connected with the other strip n through a springr/ out-- side it--which acts at one end on the jaw r on the Vspindle-and adjustable supporting nuts .sfwithin the strip. When, therefore, the strips n move inward, due to increase ofheat in the cylinder i. the valve spindle 7) is pressed in. and the plug of the Valve opens more or less the bore ol the water passage. through the valve. and. vice-versa. so that water is supplied to the generator in a greater quantity. and upon the cylinder being cooled b v this water. it causes the valve o to be closed more or less. and prevents too much water being supplied: and so thc action is carried on automatically in pulsations ot watt-r supply. When thc apparatus is cold. the, valve o will be closed.

'lhc damper j" is connected with the strips n through a. link a lever u, and a rod v; tlul rod having a iaw u at one end, and connected to the lever Il. and at the other connected to the strip Il. to which the valve body o is fastened. and near it. The jaw l" thusacts as a tulcrum to the lever u, the

short end of which is connected to the valve spindle jaw 1'; and, therefore, when the strips n move inward an abnormal amount, and the spindle 77 is pulled out, the jaw r presses the short end of the lever n, inward, and so opens the damper f1, causing thereby the amount of air entering the furnace below to decrease. The link t is slotted at the damper end, so that it will only press the damper open.r when the heat, and consequently the movement of the strips n are very excessive.

In the arrangement shown, the water is conducted from the regulating cock 0 by a pipe ur, to the descending part trl of the pipe embedded in the casting i; and from the top of that coil in the outer part of the casting, the water or steam to which it has been converted, is carried by a connecting pipe N to the hollow of the coil in'thc inner upper part ot' the casting, and thence by a pipe .r to the place of use.

In some aises. liquid or gaseous fuel may be used as the heating medium, instead ot s'ilid fuel. in which case, the thermo regulating device may be adapted to regulate the quantity ot' t'uel supplied to the generator.

What is claimed 1s 1. A steam generator comprising a casing adapted to contract and expand under the influence otl heat, a water conduit embedded in the casing. a valve in the conduit, and a valve controlling device connected to the casing at spaced apart points, whereby when the casing expands the valve controlling device will operate to open the valve.

2. A steam generator comprising a niet-al casing, adapted to contract and expand under the intiuence of heat, a conduit connected with 'the metal casing, a valve in the conduit, valve controlling means including two spaced apart members connected with the casing at spaced apart points and adapt;- ed to operate the valve to control the flow of water through the conduit.

3. A steam generator comprisinvt a body of metal, adapted to contract and expand under the infiuence of heat, a water conduit connected with the said body; a water supply valve for the conduit; valve controlling means including a pair ot' flexible strips connected to the body of metal at 'two different parts and means connected with the strips and the valve for actuating the latter according' to the expansion and contraction of the body of metal duc to the temperature.

4. A steam generator comprising a body of metal adapted to contract and expand under the influence of heat, a water conduit embedded in the said body: a water supply valve, and a valve controlling device connected at two ditferent parts to the body of metal, and to the water supply valve,

5, ln-a steam generator. the combination of a casting, having embedded in it a coil attached to the casing; a water supp y valve n or coils of tubes, and within which the fuel is burned; said casting adapted to contract and expand under the influence of heatl a Water supply valve; and a valve controlling device comprising flexible strips connected tothe casting at different points, and connected with the water supply valve.

6. In a steam generator, the combination of an outer casing; a hollow casting, adapti vtween the valve'controlling device and the valve to control the water supply; substantially as set forth.

7 A steam generator comprising an outer casing;l a cylindrical hollow casting withinthecasing; adapted to contract and expand under the influence of heat, a water conduit embedded in the casting; a hood on the top of the .outer casing; air regulating means attached to the hood; air regulatin means connected Withfthe conduit; and a controlling devices'coinprising flexible metal strips attached to the casing at two dilferent points; and means' connecting the strips to the valve and air regulating means.

8. In a steam generator, the combination of a casing, a hollow castingA mounted in the casin and adapted to contract and expand un erthe influence of heat,ithe said castingl having openings for the passa e of heat, a conduit embedded in the wal s of the castingeach side of the openings therein, a valve in the conduit, a flexiblestrip secured at its opposite ends to the casting, a connection between the flexible strip and the valve whereby when the casting expands the flexible strip .will yield and operate the valve.

9. In a steam generator the combination of a casing, a hollow casting mounted in the casing and having mounted in the walls thereof a conduit two spaced apart projec` tions on the casting a Valve in the conduit, two flexible strips secured to the projections, a draft regulator, and connections between the draft regulator the valve and the flexible strips whereby when'the casting expands the flexible strips will operate the valve and the regulator.

10.- In a steam regulator, the combination with a casing, 'a hollow casting su )ported inthe casing and-provided with a thickened portion formed with openings for the passage of heat, a conduit in the walls of the casting, the said conduit being arranged on opposite sides of the openings in the casting,

a valve in the conduit and means supported on the outside of the casting for operating the valve when the casting contracts or expands. i

In testimony whereof I have signed my name to this-specification in the presence of two subscribing Witnesses.

WLLIAM GEORGE HAY.' Witnesses:

' SOMERVIL'LE GooDALL, DONALDSON COULTER'. 

